Your girlfriend keeps hurting you emotionally, maybe because she has a traumatic past and she's still not done dealing with that. People with traumatic pasts tend to act awkward in their present life and hurt their close ones. Or maybe you're too sensitive that all her actions keep hurting you.
Your clothes are oversized and more comfortable. Besides, it's your clothes. She likes to wear it because it carries your aroma and makes her feel close to you even when you are away from one another. However, if you don't like it, express your concern before her.
Your crush calls you a dude because they consider you their friend. They feel comfortable with you and like to hang out with you. If you want to take it a step further, express your feelings to him. He is already inclined towards you, and there's hope for the future.
If your boyfriend kisses you while you are asleep, he is obsessed with you. This might be because you're the first love of his life, and he can't get enough of you. If you're in a new relationship, this is normal. If you have been dating him for long, he is madly in love with you.
She doesn't talk to you like before because you lost the spark to make conversations. She was expecting conversations to take a turn for good, but the fire diminished rapidly. However, you can make things right by talking more about the things that interest her.
Your girlfriend didn't believe you when you called her beautiful because you have not yet made her feel that beauty from within. Girls prefer action to words. Show her the beauty by either putting on a picture with her in your DP or kissing her in the right spot.